Battlegroup Styx was created following the first Terran-Florian war with the realization that the Terminal Egress could not be left undefended. This oversight by Fleet Command had allowed the Florian Matriarchy to utilize their own L-Gate to launch a surprise invasion of the GTU through the L-Cluster. The new fleet, named for the Styx System in which it resided was nominally intended to be a purely defensive formation. However, its position at the heart of the L-Gate network meant that it was often the fleet capable of rapid deployment anywhere in the Galaxy in the quickest amount of time, leading to it serving more as a quick reaction force rather then a defense line.

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